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An investigation of Proclus' logic of the syllogistic and of negations in the Elements of Theology, On the Parmenides, and Platonic Theology. It is shown that Proclus employs interpretations over a linear semantic structure with operators for scalar negations (hypernegation/alpha-intensivum and privative negation). A natural deduction system for scalar negations and the classical syllogistic (as reconstructed by Corcoran and Smiley) is shown to be sound and complete for the non-Boolean linear structures. It is explained how Proclus' syllogistic presupposes converting the tree of genera and species from Plato's diairesis into the Neoplatonic linear hierarchy of Being by use of scalar hyper and privative negations. 相似文献
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Combining non-classical (or sub-classical) logics is not easy, but it is very interesting. In this paper, we combine nonclassical logics of negation and possibility (in the presence of conjunction and disjunction), and then we combine the resulting systems with intuitionistic logic. We will find that Kracht's results on the undecidability of classical modal logics generalise to a non-classical setting. We will also see conditions under which intuitionistic logic can be combined with a non-intuitionistic negation without corrupting the intuitionistic fragment of the logic. 相似文献
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Certain extensions of Nelson's constructive logic N with strong negation have recently become important in arti.cial intelligence
and nonmonotonic reasoning, since they yield a logical foundation for answer set programming (ASP). In this paper we look
at some extensions of Nelson's .rst-order logic as a basis for de.ning nonmonotonic inference relations that underlie the
answer set programming semantics. The extensions we consider are those based on 2-element, here-and-there Kripke frames. In
particular, we prove completeness for .rst-order here-and-there logics, and their minimal strong negation extensions, for
both constant and varying domains. We choose the constant domain version, which we denote by QNc5, as a basis for de.ning a .rst-order nonmonotonic extension called equilibrium logic. We establish several metatheoretic
properties of QNc5, including Skolem forms and Herbrand theorems and Interpolation, and show that the .rst-oder version of equilibrium logic can be used as a foundation for answer set inference. 相似文献
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该文从直觉主义否定词的特性出发讨论它存在的可能性,同时比较它与ELMQ中强否定词之间的关系,最后讨论了Heyting系统中两个否定性公理的合理性问题。 相似文献
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Colman W 《The Journal of analytical psychology》2006,51(1):21-41
This paper argues that real imagination depends on the capacity to acknowledge the absence of what is imagined from the world of material actuality. This leads on to a view of symbol formation as the operation of the transcendent function between the opposites of presence and absence. 'The imaginary' is contrasted with this as a defensive misuse of imagination that attempts to deny 'negation' where negation is defined as all those aspects of the world that constitute a check to the omnipotence of fantasy--e.g., absence, loss, difference, otherness etc. Parallels are drawn with theoretical antecedents in analytical psychology and psychoanalysis, with particular attention to papers published in the Journal of Analytical Psychology (JAP) in the 1960s on the relation between active imagination, transference and ego development. A clinical example is given to show the use of the imaginary as a means of warding off the unbearable pain of Oedipal disappointment. 相似文献
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